<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div{
            width: 100px;
            height: 100px;
            /* 设置浮动 left right none */
            /* float:right; */

        }
        .one{
            background-color: red;
            float: left;
        }
        .two{
            background-color: green;
            float: left;
        }
        .three{
            background-color: blue;
            /* 清除浮动元素的影响 */
            clear:both;
        }
    </style>
</head>
<body>
    <div class="one">one</div>
    <div class="two">two</div>
    <div class="three">three</div>
</body>
</html>